Removal of thermoplastic resin coatings from paperboard with halogenated hydrocarbon vapors

• Main Authors: VALLE-RIESTRA, J FRANK, KELLY, ROBERT J
• Format: Patent
• Language: English
• Published: 18.03.1980
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS THEREFOR; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; FILLING PASTES; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PAPER-MAKING; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

Paperstock pieces coated with a thermoplastic resin are introduced into and agitated together in a pool of hot, saturated vapors of a liquid, halogenated hydrocarbon capable of wetting the resin. The vapors condense on the resin surface and the resin is loosened and removed by the combined actions of the agitation and of the vapors and condensate.